Homework Statement
How many rice grains are needed for an electric charge of a certain strength (I don't remember the value now but is it really relevant?) to be equally distributed amongst them?
Homework Equations
I hope you can answer that :)
The Attempt at a Solution
I can...
Homework Statement
http://www.freeimagehosting.net/uploads/3e00ce8695.gif
Homework Equations
Electric field equation derived from Coloumb's Law (given on the screenshot above).
The Attempt at a Solution
Solution is given in the form of answer sheet...